Spacelift vs GitLab Duo
Spacelift and GitLab Duo are both popular tools in the DevOps & Infrastructure space. Both use a paid pricing model, with Spacelift starting at $40/mo and GitLab Duo at $19/mo. Below we break down features, pricing, strengths, and weaknesses to help you decide which tool fits your workflow best.
Last updated: March 2026
Quick Verdict
Choose Spacelift if you want infrastructure as code management with ai-powered policy enforcement.. Spacelift's biggest strengths include best multi-iac platform supporting all major tools and policy enforcement prevents dangerous infrastructure changes. It's also rated higher (4.2 vs 3.9). Choose GitLab Duo if you prefer ai-powered devsecops built into the gitlab platform.. Key advantages include ai integrated across the entire devsecops lifecycle and single platform eliminates tool sprawl.
Infrastructure as code management with AI-powered policy enforcement.
AI-powered DevSecOps built into the GitLab platform.
| Spacelift | GitLab Duo | |
|---|---|---|
| Pricing | $40/mo | $19/mo |
| Free Tier | No | No |
| Pricing Model | Paid | Paid |
| Rating | ★ 4.2 | ★ 3.9 |
| Categories | DevOps & Infrastructure | Code Generation, DevOps & Infrastructure |
| Key Features | 6 features | 6 features |
| Feature | Spacelift | GitLab Duo |
|---|---|---|
| Multi-IaC support (Terraform, Pulumi, CloudFormation, Ansible) | ✓ | — |
| Automated drift detection and remediation | ✓ | — |
| Policy-as-code with Open Policy Agent | ✓ | — |
| AI-assisted infrastructure change analysis | ✓ | — |
| Approval workflows and plan previews | ✓ | — |
| Self-hosted and SaaS deployment options | ✓ | — |
| AI code suggestions in the GitLab Web IDE | — | ✓ |
| Merge request summaries and review assistance | — | ✓ |
| AI-powered vulnerability explanation and resolution | — | ✓ |
| CI/CD pipeline generation from natural language | — | ✓ |
| Code explanation and documentation generation | — | ✓ |
| Root cause analysis for failed pipelines | — | ✓ |
Spacelift
Pros
- + Best multi-IaC platform supporting all major tools
- + Policy enforcement prevents dangerous infrastructure changes
- + Drift detection catches unauthorized manual changes
- + Strong enterprise features with self-hosted option
Cons
- − Premium pricing aimed at enterprise teams
- − Steeper learning curve than simpler CI/CD tools
- − No free tier for evaluation
GitLab Duo
Pros
- + AI integrated across the entire DevSecOps lifecycle
- + Single platform eliminates tool sprawl
- + Strong security features with vulnerability resolution
- + Natural language CI/CD pipeline generation
Cons
- − Requires GitLab Premium or Ultimate subscription
- − AI features less capable than dedicated tools like Copilot
- − Lock-in to the GitLab ecosystem
The Bottom Line
Choose Spacelift if: you want infrastructure as code management with ai-powered policy enforcement.. It holds a higher user rating (4.2 vs 3.9). Keep in mind: premium pricing aimed at enterprise teams.
Choose GitLab Duo if: you prefer ai-powered devsecops built into the gitlab platform.. Keep in mind: requires gitlab premium or ultimate subscription.
Both tools compete in the DevOps & Infrastructure space. The right choice depends on your specific needs, team size, and budget.
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